 | | RE: V2X Compass
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I didn't actually buy the clock, the company that I work for was scrapping a load of stuff from one of it's buildings and these clocks were some of it. The company said if we gave 2 pounds to charity we could have a clock. They have been very (...) (27 years ago, 27-Feb-98, to lugnet.robotics.handyboard)
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| | Help for problems with Polaroid 6500 sonar board
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Hi all if anyone has problems using the 6500 series for distances below 35cm by using the binh signal I have a possible solution to the problem. We also expierienced problems using the sensors for distances between 15cm and 40cm. We finally found (...) (27 years ago, 27-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar questions (technical ones!)
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(...) Yes! I have been working from your sonar page, but as a sanity check I checked the Polaroid sheet again. Whoops! At least we were both tripped up by it. I'm used to seeing the "speed of sound" (ft/ms) quoted, not the "slowness of sound" (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar questions (technical ones!)
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Good questions!! (...) The polaroid number/widely quoted number is 0.9 MILLISECONDS PER FOOT -- or 1.11 ft/ms. hence the conversion matches! I think also I have this wrong on my HB sonar page! This confused me for a while too. (...) Yes, this is (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar for cheap
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... still a good book though- I recommend it highly :) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar for cheap
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(...) parts should be under $10.00. Has anyone tried this circuit? Yeah, it doesn't work :) That's why I designed my circuit in the first place. I tore my hair out for a couple of weeks trying to figure out what I was doing wrong. I finally realized (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | thanks
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Thansk for the quick reply, everyone! phil (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar for cheap
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That was probably my web page, the URL changed (my provider's doing) so its now (URL) (which I don't mind as that's my domain, but it confused the hell out of millions :) The old URL (which is no longer) was: (URL) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar for cheap
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Also. The Robot Builders Bonanza has a similar circuit. The price for the parts should be under $10.00. Has anyone tried this circuit? (...) information (...) site (...) ___...___ ___...___ Jonathan Swaby 305 Sparks Bldg Computer Support Specialist (...) (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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| | Re: Sonar for cheap
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(...) Yep, check out: (URL) Mike Vande Weghe (27 years ago, 26-Feb-98, to lugnet.robotics.handyboard)
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